Potential security issue
I use a variety of php scripts, including wordpress, cubecart, tolra web directory, etc.
Several times lately, people using those scripts have been hacked by crackers using phpshell and other similar scripts. (I haven't - I just seem to be the only person around the fora who thought it might be worthwhile to contact you....)
The modum operandum is simple: the cracker hooks up phpshell etc. to a domain on shared server space, and browses until s/he finds a database or other configuration information, then uses that from within phpshell to pry open anything they want (or so it seems from reading....)
Now, I'm not an alarmist. I'm also very strict about backing up everything on any of my own or clients' domains - files, databases, and so on. So a hacking isn't going to kill us. Regardless, no one wants to deal with the fallout!
My point to commenting here is simply to let you know this seems to be a growing problem, and to suggest that there might be some way you could provide some limits within the program to prevent this type of use. I have no idea of course if that would even be possible.